submodule: bump openthread from `afc55a3` to `adf4e84` (#13)
submodule: bump openthread from `afc55a3` to `adf4e84` (#13)

Bumps [openthread](https://github.com/openthread/openthread) from `afc55a3` to `adf4e84`.
- [Commits](https://github.com/openthread/openthread/compare/afc55a384b341ab4118f70f61516d91291f3978f...adf4e84caf71b63f3026640fdd31055daf1e27e8)

---
updated-dependencies:
- dependency-name: openthread
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
openthread/ot-ifx,Infineon/ot-ifx-release,openthread/ot-ifx,Infineon/ot-ifx-release,openthread/ot-ifx,Infineon/ot-ifx-release